Step by step guide to mine?

Today is my first day. I downloaded litecoin core - wallet, added the xz program, to down load the files faster. All went well. My question is, now what? I am staring at an application just sitting there (once the data loading was done), with no option to “mine”. I realize my iMac is not going to mine me a fortune. That is really not what I am expecting. I just want to understand how to do this. This means mine, buy, trade, etc. I am fairly strong with technology, but certainly not an expert. Any points int he right direction would be appreciated.

you need to buy an asic…check out ebay and do a search for scrypt miner or